var dirimage = "/javascript/lightbox/";
(function ($a)
{
    var opts;
    $a.fn.lightbox = function (options)
    {
        opts = $a.extend({}, $a.fn.lightbox.defaults, options);
        $a.fn.lightbox.initialize();
        return this.each(function ()
        {
            $a(this).click(function ()
            {
                $a(this).lightbox.start(this);
                return false;
            })
        })
    };
    $a.fn.lightbox.initialize = function ()
    {
        $a('#overlay').remove();
        $a('#lightbox').remove();
        opts.inprogress = false;
        var outerImage = '<div id="outerImageContainer"><div id="imageContainer"><img id="lightboxImage"><div id="hoverNav"><a href="javascript://" title="' + opts.strings.prevLinkTitle + '" id="prevLink"></a><a href="javascript://" id="nextLink" title="' + opts.strings.nextLinkTitle + '"></a></div><div id="loading"><a href="javascript://" id="loadingLink"><img src="/images/logo.png"><br><img src="' + opts.fileLoadingImage + '"></a></div></div></div>';
        var imageData = '<div id="imageDataContainer" class="clearfix"><div id="imageData"><div id="imageDetails"><span id="caption"></span><span id="numberDisplay"></span></div><div id="bottomNav">';
        if (opts.displayHelp) {
            imageData += '<span id="helpDisplay">' + opts.strings.help + '</span>';
        }
        imageData += '<a href="javascript://" id="bottomNavClose" title="' + opts.strings.closeTitle + '"><img src="' + opts.fileBottomNavCloseImage + '"></a></div></div></div>';
        var string;
        if (opts.navbarOnTop)
        {
            string = '<div id="overlay"></div><div id="lightbox">' + imageData + outerImage + '</div>';
            $a("body").append(string);
            $a("#imageDataContainer").addClass('ontop')
        }
        else
        {
            string = '<div id="overlay"></div><div id="lightbox">' + outerImage + imageData + '</div>';
            $a("body").append(string)
        }
        $a("#overlay").click(function ()
        {
            $a.fn.lightbox.end()
        }).hide();
        $a("#lightbox").click(function ()
        {
            $a.fn.lightbox.end()
        }).hide();
        $a("#loadingLink").click(function ()
        {
            $a.fn.lightbox.end();
            return false;
        });
        $a("#bottomNavClose").click(function ()
        {
            $a.fn.lightbox.end();
            return false;
        });
        $a('#outerImageContainer').width(opts.widthCurrent).height(opts.heightCurrent);
        $a('#imageDataContainer').width(opts.widthCurrent)
    };
    $a.fn.lightbox.getPageSize = function ()
    {
        var xScroll, yScroll;
        if (window.innerHeight && window.scrollMaxY)
        {
            xScroll = window.innerWidth + window.scrollMaxX;
            yScroll = window.innerHeight + window.scrollMaxY
        }
        else if (document.body.scrollHeight > document.body.offsetHeight) {
            xScroll = document.body.scrollWidth;
            yScroll = document.body.scrollHeight
        }
        else {
            xScroll = document.body.offsetWidth;
            yScroll = document.body.offsetHeight
        }
        var windowWidth, windowHeight;
        if (self.innerHeight)
        {
            if (document.documentElement.clientWidth) {
                windowWidth = document.documentElement.clientWidth
            }
            else {
                windowWidth = self.innerWidth
            }
            windowHeight = self.innerHeight
        }
        else if (document.documentElement && document.documentElement.clientHeight)
        {
            windowWidth = document.documentElement.clientWidth;
            windowHeight = document.documentElement.clientHeight
        }
        else if (document.body) {
            windowWidth = document.body.clientWidth;
            windowHeight = document.body.clientHeight
        }
        if (yScroll < windowHeight) {
            pageHeight = windowHeight
        }
        else {
            pageHeight = yScroll
        }
        if (xScroll < windowWidth) {
            pageWidth = xScroll
        }
        else {
            pageWidth = windowWidth
        }
        var arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight);
        return arrayPageSize;
    };
    $a.fn.lightbox.getPageScroll = function ()
    {
        var xScroll, yScroll;
        if (self.pageYOffset) {
            yScroll = self.pageYOffset;
            xScroll = self.pageXOffset
        }
        else if (document.documentElement && document.documentElement.scrollTop)
        {
            yScroll = document.documentElement.scrollTop;
            xScroll = document.documentElement.scrollLeft
        }
        else if (document.body) {
            yScroll = document.body.scrollTop;
            xScroll = document.body.scrollLeft
        }
        var arrayPageScroll = new Array(xScroll, yScroll);
        return arrayPageScroll;
    };
    $a.fn.lightbox.pause = function (ms)
    {
        var date = new Date();
        var curDate = null;
        do {
            curDate = new Date()
        }
        while (curDate - date < ms) {;
        }
    };
    $a.fn.lightbox.start = function (imageLink)
    {
        $a("select, embed, object").hide();
        var arrayPageSize = $a.fn.lightbox.getPageSize();
        $a("#overlay").hide().css({
            width : '100%', height : arrayPageSize[1] + 'px', opacity : opts.overlayOpacity
        }).fadeIn();
        opts.imageArray = [];
        imageNum = 0;
        var anchors = document.getElementsByTagName(imageLink.tagName);
        if (!imageLink.rel || (imageLink.rel == ''))
        {
            opts.imageArray.push(new Array(imageLink.href, opts.displayTitle ? imageLink.title : ''))
        }
        else
        {
            $a("a").each(function ()
            {
                if (this.href && (this.rel == imageLink.rel)) {
                    opts.imageArray.push(new Array(this.href, opts.displayTitle ? this.title : ''))
                }
            });
            for (i = 0; i < opts.imageArray.length; i++)
            {
                for (j = opts.imageArray.length - 1; j > i; j--) {
                    if (opts.imageArray[i][0] == opts.imageArray[j][0]) {
                        opts.imageArray.splice(j, 1)
                    }
                }
            }
            while (opts.imageArray[imageNum][0] != imageLink.href) {
                imageNum++
            }
        }
        var arrayPageScroll = $a.fn.lightbox.getPageScroll();
        var lightboxTop = arrayPageScroll[1];
        var lightboxLeft = arrayPageScroll[0];
        $a('#lightbox').css({
            top : lightboxTop + 'px', left : lightboxLeft + 'px'
        }).show();
        if (!opts.slideNavBar) {
            $a('#imageData').hide();
        }
        $a.fn.lightbox.changeImage(imageNum)
    };
    $a.fn.lightbox.changeImage = function (imageNum)
    {
        if (opts.inprogress == false)
        {
            opts.inprogress = true;
            opts.activeImage = imageNum;
            $a('#loading').show();
            $a('#lightboxImage').hide();
            $a('#hoverNav').hide();
            $a('#prevLink').hide();
            $a('#nextLink').hide();
            if (opts.slideNavBar) {
                $a('#imageDataContainer').hide();
                $a('#imageData').hide();
                $a.fn.doChangeImage()
            }
            else {
                $a.fn.doChangeImage()
            }
        }
    };
    $a.fn.doChangeImage = function ()
    {
        imgPreloader = new Image();
        imgPreloader.onload = function ()
        {
            var newWidth = imgPreloader.width;
            var newHeight = imgPreloader.height;
            if (opts.fitToScreen)
            {
                var arrayPageSize = $a.fn.lightbox.getPageSize();
                var ratio;
                var initialPageWidth = arrayPageSize[2] - 2 * opts.borderSize;
                var initialPageHeight = arrayPageSize[3] - 200;
                if (imgPreloader.height > initialPageHeight)
                {
                    newWidth = parseInt((initialPageHeight / imgPreloader.height) * imgPreloader.width);
                    newHeight = initialPageHeight
                }
                else if (imgPreloader.width > initialPageWidth)
                {
                    newHeight = parseInt((initialPageWidth / imgPreloader.width) * imgPreloader.height);
                    newWidth = initialPageWidth;
                }
            }
            $a('#lightboxImage').attr('src', opts.imageArray[opts.activeImage][0]).width(newWidth).height(newHeight);
            $a.fn.lightbox.resizeImageContainer(newWidth, newHeight)
        };
        imgPreloader.src = opts.imageArray[opts.activeImage][0]
    };
    $a.fn.lightbox.end = function ()
    {
        $a.fn.lightbox.disableKeyboardNav();
        $a('#lightbox').hide();
        $a('#overlay').fadeOut();
        $a('select, object, embed').show()
    };
    $a.fn.lightbox.preloadNeighborImages = function ()
    {
        if ((opts.imageArray.length - 1) > opts.activeImage)
        {
            preloadNextImage = new Image();
            preloadNextImage.src = opts.imageArray[opts.activeImage + 1][0]
        }
        if (opts.activeImage > 0)
        {
            preloadPrevImage = new Image();
            preloadPrevImage.src = opts.imageArray[opts.activeImage - 1][0];
        }
    };
    $a.fn.lightbox.keyboardAction = function (e)
    {
        if (e == null) {
            var keycode = event.keyCode;
            var escapeKey = 27
        }
        else {
            var keycode = e.keyCode;
            var escapeKey = e.DOM_VK_ESCAPE
        }
        var key = String.fromCharCode(keycode).toLowerCase();
        if ((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)) {
            $a.fn.lightbox.end()
        }
        else if ((key == 'p') || (keycode == 37))
        {
            if (opts.activeImage != 0) {
                $a.fn.lightbox.disableKeyboardNav();
                $a.fn.lightbox.changeImage(opts.activeImage - 1)
            }
        }
        else if ((key == 'n') || (keycode == 39))
        {
            if (opts.activeImage != (opts.imageArray.length - 1)) {
                $a.fn.lightbox.disableKeyboardNav();
                $a.fn.lightbox.changeImage(opts.activeImage + 1)
            }
        }
    };
    $a.fn.lightbox.resizeImageContainer = function (imgWidth, imgHeight)
    {
        opts.widthCurrent = document.getElementById('outerImageContainer').offsetWidth;
        opts.heightCurrent = document.getElementById('outerImageContainer').offsetHeight;
        var widthNew = (imgWidth + (opts.borderSize * 2));
        var heightNew = (imgHeight + (opts.borderSize * 2));
        opts.xScale = (widthNew / opts.widthCurrent) * 100;
        opts.yScale = (heightNew / opts.heightCurrent) * 100;
        wDiff = opts.widthCurrent - widthNew;
        hDiff = opts.heightCurrent - heightNew;
        $a('#imageDataContainer').animate({
            width : widthNew
        },
        opts.resizeSpeed, 'linear');
        $a('#outerImageContainer').animate({
            width : widthNew
        },
        opts.resizeSpeed, 'linear', function ()
        {
            $a('#outerImageContainer').animate({
                height : heightNew
            },
            opts.resizeSpeed, 'linear', function ()
            {
                $a.fn.lightbox.showImage()
            })
        });
        if ((hDiff == 0) && (wDiff == 0)) {
            if (jQuery.browser.msie) {
                $a.fn.lightbox.pause(250)
            }
            else {
                $a.fn.lightbox.pause(100)
            }
        }
        $a('#prevLink').height(imgHeight);
        $a('#nextLink').height(imgHeight)
    };
    $a.fn.lightbox.showImage = function ()
    {
        $a('#loading').hide();
        $a('#lightboxImage').fadeIn("fast");
        $a.fn.lightbox.updateDetails();
        $a.fn.lightbox.preloadNeighborImages();
        opts.inprogress = false;
    };
    $a.fn.lightbox.updateDetails = function ()
    {
        if (opts.imageArray[opts.activeImage][1]) {
            $a('#caption').html(opts.imageArray[opts.activeImage][1]).show()
        }
        if (opts.imageArray.length > 1)
        {
            var nav_html;
            nav_html = opts.strings.image + (opts.activeImage + 1) + opts.strings.of + opts.imageArray.length;
            if ((opts.activeImage) > 0)
            {
                nav_html = '<a title="' + opts.strings.prevLinkTitle + '" href="#" id="prevLinkText">' + opts.strings.prevLinkText + "</a>" + nav_html
            }
            if ((opts.activeImage + 1) < opts.imageArray.length)
            {
                nav_html += '<a title="' + opts.strings.nextLinkTitle + '" href="#" id="nextLinkText">' + opts.strings.nextLinkText + "</a>"
            }
            $a('#numberDisplay').html(nav_html).show()
        }
        if (opts.slideNavBar) {
            $a("#imageData").slideDown(opts.navBarSlideSpeed)
        }
        else {
            $a("#imageData").show()
        }
        var arrayPageSize = $a.fn.lightbox.getPageSize();
        $a('#overlay').height(arrayPageSize[1]);
        $a.fn.lightbox.updateNav()
    };
    $a.fn.lightbox.updateNav = function ()
    {
        $a('#hoverNav').show();
        if (opts.activeImage != 0)
        {
            $a('#prevLink,#prevLinkText').show().click(function ()
            {
                $a.fn.lightbox.changeImage(opts.activeImage - 1);
                return false;
            })
        }
        if (opts.activeImage != (opts.imageArray.length - 1))
        {
            $a('#nextLink,#nextLinkText').show().click(function ()
            {
                $a.fn.lightbox.changeImage(opts.activeImage + 1);
                return false;
            })
        }
        $a.fn.lightbox.enableKeyboardNav()
    };
    $a.fn.lightbox.enableKeyboardNav = function ()
    {
        document.onkeydown = $a.fn.lightbox.keyboardAction
    };
    $a.fn.lightbox.disableKeyboardNav = function ()
    {
        document.onkeydown = '';
    };
    $a.fn.lightbox.defaults = 
    {
        fileLoadingImage : dirimage + 'loading.gif', fileBottomNavCloseImage : dirimage + 'closelabel.gif', 
        overlayOpacity : 0.8, borderSize : 10, imageArray : new Array, activeImage : null, inprogress : false, 
        resizeSpeed : 350, widthCurrent : 250, heightCurrent : 250, xScale : 1, yScale : 1, displayTitle : true, 
        navbarOnTop : false, slideNavBar : false, navBarSlideSpeed : 350, displayHelp : false, strings : 
        {
            help : ' \u2190 / P - previous image\u00a0\u00a0\u00a0\u00a0\u2192 / N - next image\u00a0\u00a0\u00a0\u00a0ESC / X - close image gallery', 
            prevLinkTitle : 'previous image', nextLinkTitle : 'next image', prevLinkText : '&laquo; Previous', 
            nextLinkText : 'Next &raquo;', closeTitle : 'close image gallery', image : 'Image ', of : ' of '
        },
        fitToScreen : false
    }
})(jQuery);
